Ms. Naly conducted a survey among his students on whether they prefer online instruction or a face-to-face learning environment. 80 out of 100 said they prefer face-to-face learning environments. If 35 students are selected randomly, what is the probability that: (a) At least twenty of the students will prefer a face-to-face learning environment? (b) No more than twenty-two of the students will prefer a face-to-face learning environment? (c) How many students are expected to prefer a face-to-face learning environment